Rotary pump.



F. VAN CAUWENBEGH.

ROTARY PUMP.

APPLICATION FILED MAR. 5. 1915. 1,172,505, Patented Feb. 22,1916.

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d EnANKvAN CAUWENBEEGH, or nocxronn, ILLINOIS.

ROTARY PUMP.

Specification of Letters Patent.

Patented Feb. 22, 1916.

Application filed March 5, 1915. Serial No. 12,314.

To all whom t may concern:

Be it known that "I, FRANK VAN GAUwEN- BEEGH, a citizen of the United States, residing at Rockford, in the county of finnebago and State of Illinois, have invented certain new and useful Improvements in Rotary Pumps, of which the following is a speciiication. y

This invention relates in` general to rotary pumps adapted to pump liquid and has more particular reference to those used for pumping and circulating oil in systems for supplying a continuous vstream of oil to cutting tools in metal-working machines.

In the operation of metal-working machines such as lathes, milling machines, drills, grinders, `power saws and various other machines, itis desirable and moreover, essential in many instances, to supply a continuous stream of oil to the cutting tool during opera-tion' in order to produce proper cutting and to maintain the tool in cutting condition. The used oil drains into a tank and is again pumped through pipes to the cutting tool, and thus kept circulating, as is well understood in'machine shop practice. Much difficulty has been experienced in attempting `to provide a pump that will operate in these systems without becoming worn and clogged in a short time, due to the fine metal filings and' chips in the oil which can not be practically separated therefrom by sievesi The primary object of my invention is to provide an improved rotarypump Vparticularly adapted for usein oil-circulating systems, such as those above described yand which will operate very efficiently without becoming clogged and worn as do rotary pumps in general use.

Another object of my invention is to provide a rotary pump of improved design and few parts whereby the pump may `be manufactured at a low cost.

Other objects of my invention and attendant advantages thereofv will be readily apparent as the same becomes better understood by reference to the following detail description when considered in connection with the accompanying drawingsywherein,

Figure 1 is a plan view of-a rotary vpump embodying my improvements; iFig. 2 is a vertical sectional view through the. pump .taken `on the line 2-2 of Fig. 3, Fig. 3 is a vertical transverse sectional view through `the pump vtaken on the lineB-B of Fig. 2; Fig. 4 is a plan ysection taken on the line 4 4 of Fig. 2, and Fig. 5 is a detail 1n perspective of the rocking abutment.

Referring to the drawings, it will be observed that the working parts or elements are contained in a substantially circular chamber designated by reference character 4 formed by a casing or housing comprising a main body 5 open at one side and a plate y6 coveringthe" said open side and fastened to the said body by machine screws' 7. A shaft 8, passing ythrough and Journaled in the plate 6 and in the body wall opposite said plate,'has ixedly mounted thereon vwithin the chamber a rotor or piston designated generally -by reference `character y9.' This rotor is shaped to provide three equally spaced, radially extending pistons 11, which collectively are vof a general triangular shape. portion 12 of the wall of the body '5 is formed onv an arcconcentric with the pivot raxis of the rotor yandin Isuch proximity to the rotor as to form a stationary abutment with which the endspof the pistons coperate during opera- Vtion@ The rotor extends crosswise of the chamber the entire width thereof, so that Vvpassage of liquid. through the portion of the chamber occupied by the rotor is precluded, although such passage is permitted by rotary. movement of the rotor in a clock- Vwise direction, viewing Fig. 2, whereby liquid will be drawn by the pistons from the intake 15 at the base of the chamber and'raised between therotor and the statationary'abutment 12. A suitable stuffing# box 13 is provided for the shaft bearing inthe plate 6. The shaft 8 may be driven by any suitable means, as for` instance by a pulleyplll ask shown in the drawings.

A rockingfabutment designated generally 'by reference character 16, disposed within the chamber t and shaped to provide a pair of spaced-arms A17 in engagement with the periphery of the rotor on diametrically opposite sides thereof, is pivotally mounted on a pin 18 carried'by the casing 5 and plate 6, whereby the abutment will be. o scillated as the rotor is turned. Y The periphery'of the rotor or of the piston arms thereof is so Yshaped that the diametrical distance through the rotor at anyL radial point is riphery of the'rotor as the same is turned.-

'lhe upper arm of the abutment and the pivy oted portion thereof are of the same width as the rotor, as is seen in Figs. 3 and 5, the lower arm being of less width, as is also shown in said iigures. The pivoted end of the abutment is curved as at 19 to form a tight joint with `a similarly curved recess in the adjacent wallof the body 5. It is obvious that the chamber 4 is divided by the rotor and rocking abutment which coperate with opposite walls of the body 5 in a manner to preclude, when the rotor and abutment are stationary, ypassage of liquid through the chamber to opposite sides `of the rotor and abutment, and that with an eX- hause opening leading from the chamber at l any point above said division thereof, the liquid may be drawn fromtheinlet l5 by turning the rotor and raised by the pistons above said division of the chamber andexpelled through the said exhaust opening.

Since, as above explained, Ihave provided a pump especially adapted for pumping oil laden `with minute steel or iron filings and chips because of conditions under which oil is used, it is `obvious that there will be a tendency for many of these small particles to settle and lodge in the pump and clog the working parts thereof. My improvements have been designed to obviatel this difliculty and, While providing simplified pumping elements, I have so arranged them and the course of liquid passage through the pump kthat the tendency for said particles to become lodged in the pump is reduced to a minimum. It will be seen that lsince the lower arm of the abutment :member is of less width than the chamber and the inlet is located at the bottom thereof, any settling particles will be immediately drawn bythe pistons into circu lation. Since the lowest point in therchamber above the rotor and rocking abutment is adjacent to the pivot ofthe latter, IV have located the exhaust opening ,2l at this point and have formed the abutment with a chann nel 22, as best shown in Fig. 3, leading downwardly to the exhaust opening, thereby providing in an efficient manner against the possibility of particles settling and `becoming lodged in the upper portion of the chamber so as to clog the working parts.

It it believed that for the foregoing, my`

invention and `its mode of operation will be readily understood, and that the details of structure and relative arrangement as herein shown might be variously modified without `involving vany substantial change in structure or `its principles of operation.

It should, therefore, be understood that I:l

do not limitmyself to the exact construc- .tion herein shown and described, but. reserve theright to make such variations therein as fall within the spirit yandy scopeof the `in vention as expressed in the appended claims.l

I claim:

l. In a rotary pump, thecombination of a rotary piston having-three radially`= extending and yequally spaced piston-arma .a stationary abutment with which said arms coperate as the piston is rotated, and'.y :a

rocking abutment engagingthe periphery of the piston on diametricallypopposite sides thereof, the peripheryof the .pistonagbeing shaped to maintain said. rocking `abutment in said engagement asthe :piston is-rotated.

2.' A rotary pump comprising a chamber having an intake and ,an exhaust opening` spaced apart,f a pistonl mounted to rot-ate in the chamber and having a plurality of in# tegrally constructed piston arms adapted to coperate with a :portion of the lchamber wall 4intermediate said, intake and zexhaust openings, a rocking abutment engaging the periphery of the pistony and being arranged to preclude. passage of liquid in the chamber between the said intake and exhaust openings,and means connected to and movable with said abutment and engaging` the periphery of the `pistonl for positively holding said abutment in engagement vwith the periphery of the piston continuously .during 1 complete rotation thereof.

8. In a rotary pump, the combinatlon of a chamber having an4 intake and an exhaust opening spaced apart-a triangularly shaped piston mounted to rotate in the/chamber so that the vertices thereof:constitutingpistons are adapted to engage-a portion ofthe wall;

of the chamber intermediatethe intake.` and exhaust openings, and an` abutment=pivo` tally mounted in the Vchamber at the side l thereof opposite said wall-engaged portion and shaped to engage the periphery Vof ythe f pistonl at di-ametrically opposite sides thereof, whereby to be maintained. in engagement with the perlphery of the piston as the same is rotated and to preclude passage of liquid from the exhaust to the intake opening through the abutment side of the chamber.

t. In a rotary pump, the combination of a` piston chamber, a piston rotatablymounted therein and having a plurality of integrally constructed, radially` extending piston. arms adapted to coperate with one side of thef piston chamber as the piston is rotated, a

rocking `abutment pivotally mounted in: the` piston chamber and having a pair of integrally constructed arms spaced apart and engaging the peripheral face of 'the piston on diametrically opposite sides thereof, the

periphery of the piston being so shapedthat the abutment arms will engagethe same at: lall times during `rot-ationA thereof, whereby to preclude passage of lliquid from one to the other side of the piston at the abutment side thereof, and the casing being provided with an intake opening on one side of the piston and abutment and with an exhaust opening on the other side thereof.

5. A rotary pump comprising la casing forming a piston chamber, a piston rotatably mounted therein and having a plurality of rigid, radially extending arms, a stationar arcuate abutment with which said arms coperate, a rocking abutment engaging the periphery of the piston on diametrically opposite sides thereof and being pivotally mounted and arranged in the chamber to preclude passage of liquid past the rocking abutment, the periphery of the piston being so shaped vthat said rocking abutment will be maintained in engagement therewith on diametrically opposite sides thereof, and the casing being provided with an intake and an exhaust opening to said chamber at opposite sides of the division in the chamber formed by the piston and the stationary and rocking abutments.

6. In a rotary pump, the combination of a easing forming a piston chamber, a piston mounted therein to rotate on a horizontal axis and having a plurality of rigid piston arms, the casing being shaped to provide a stationary abutment at one side of the piston with which the arms thereof ooperate, a rocking abutment pivotally mounted in the chamber ona horizontal aXis in substantially horizontal alinement with the said piston axis and having a pair of oppositely extending arms engaging the periphery of the pisand rocking abutment and adjacent to the y pivoted portion of the said rocking abutment.

FRANK VAN CAUVENBERGH. Vitnesses:

JOHN F. MGCANNA, DELLA ATKINSON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

